package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional(rollbackFor = Exception.class)
    public OrderSubmitVO ordersubmit(OrdersSubmitDTO ordersSubmitDTO) {
        //判断地址簿是否为空
        Long addressBookId = ordersSubmitDTO.getAddressBookId();
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //判断购物车是否为空
        ShoppingCart shoppingCart = new ShoppingCart();
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> carts = shoppingCartMapper.list(shoppingCart);
        if (carts == null || carts.size() == 0) {
            throw new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表插入1条数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, order);
        order.setUserId(userId);
        order.setOrderTime(LocalDateTime.now());
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setCheckoutTime(LocalDateTime.now());
        order.setCancelTime(LocalDateTime.now());
        order.setUserName(userMapper.getById(userId).getName());
        LocalDateTime newDeliveryTime = order.getOrderTime().plus(30, ChronoUnit.MINUTES);
        order.setDeliveryTime(newDeliveryTime);


        order.setNumber(String.valueOf(System.currentTimeMillis()));
        orderMapper.insert(order);
        //向订单明细表插入n条数据

        List<OrderDetail> orderDetails = new ArrayList<>();

        for (ShoppingCart cart : carts) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetails.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetails);
        //删除购物车数据
        shoppingCartMapper.cleanShoppingCart(userId);
        //返回封装VO对象
        OrderSubmitVO orderSubmitVO = new OrderSubmitVO();
        orderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();
        return orderSubmitVO;
    }

    /**
     * 历史订单查询
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(OrdersPageQueryDTO ordersPageQueryDTO) {
        //设置分页参数
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        Page<Orders> page = orderMapper.page(ordersPageQueryDTO);
        List<OrderVO> orderVOList = new ArrayList<>();
        if (page != null && page.size() > 0) {
            for (Orders orders : page) {
                Long ordersId = orders.getId();//获取订单id
                List<OrderDetail> orderDetailList = orderDetailMapper.list(ordersId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                orderVOList.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), orderVOList);
    }

    /**
     * 订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO pageDetail(Long id) {

        List<Orders> ordersList = orderMapper.getById(id);

        Orders orders = ordersList.get(0);
        List<OrderDetail> orderDetailList = orderDetailMapper.list(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 再来一个订单
     *
     * @param
     */
    @Override
    public void repetiton(Long id) {
        //获取用户id
        Long userId = BaseContext.getCurrentId();
        //获取订单信息
        List<OrderDetail> orderDetailList = orderDetailMapper.list(id);
        //强转为购物车对象
        List<ShoppingCart> carts = new ArrayList<>();
        for (OrderDetail orderDetail : orderDetailList) {
            ShoppingCart cart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail, cart);
            cart.setUserId(userId);
            cart.setCreateTime(LocalDateTime.now());
            carts.add(cart);
        }
        shoppingCartMapper.insertBatch(carts);
    }

    /**
     * 用户取消订单
     *
     * @param id
     */
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id).get(0);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 订单催单
     *
     * @param
     */
    @Override
    public void reminder(Long id) {
        orderMapper.reminder(id);
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }


    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 管理端用户查询
     *
     * @param
     * @param
     * @return
     */
    @Override
    public PageResult adminpage(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.page(ordersPageQueryDTO);
        List<OrderVO> orderVOList = new ArrayList<>();
        for (Orders orders : page) {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders, orderVO);
            List<OrderDetail> orderDetailList = orderDetailMapper.list(orders.getId());
            String dishSummary = orderDetailList.stream()
                    .map(detail -> detail.getName() + " * " + detail.getNumber())
                    .collect(Collectors.joining("，")); // 用中文逗号连接
            orderVO.setOrderDishes(dishSummary +";");
            orderVOList.add(orderVO);
        }
        return new PageResult(page.getTotal(), orderVOList);
    }


    /**
     * 取消订单
     *
     * @param
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Long orderId = ordersCancelDTO.getId();
        Orders orders = orderMapper.getById(orderId).get(0);
        orders.setRejectionReason(ordersCancelDTO.getCancelReason());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.cancel(ordersCancelDTO);
    }
    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Long orderId = ordersConfirmDTO.getId();
        Orders orders = orderMapper.getById(orderId).get(0);
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);

    }
    /**
     * 拒绝订单
     *
     * @param id
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Long id = ordersRejectionDTO.getId();
        Orders orders = orderMapper.getById(id).get(0);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setStatus(Orders.CANCELLED);
        orderMapper.rejection(orders);
    }
    /**
     * 派送订单
     *
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders orders = orderMapper.getById(id).get(0);
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }
    /**
     * 完成订单
     *
     * @param id
     */
    @Override
    public void complete(Long id) {
        Orders orders = orderMapper.getById(id).get(0);
        orders.setStatus(Orders.COMPLETED);
        orderMapper.update(orders);

    }
}
